Automotive customers look to us for a variety of spiral-wound, heat-shrinkable, plastic combination tubes. The primary function of such tubes is to provide the electrical, mechanical, thermal, and environmental insulation necessary to protect the electrical connections in motors.

A more-complete list of applications for our automotive insulation products would include ...

• electric motor armature shaft spacers/insulators
• battery cable protectors
• heat shield dielectric barriers
• lead wire insulation
• coil forms (for starters/alternators)
• wire splice insulation
• slot insulators/liners

Our motor insulation tubes are made of a specially bonded and  spiral-wound polyester, polyamide, polyimide formulation.

Sizes:

• ID: .026" to 2.000"
• Wall Thicknesses: .0015" to .012"
• Lengths: up to 36.000"

Types:

• NS (No Shrink) polyester outside/HS (Heat Shrink) polyester inside - HS polyester inside shrinks around the splice protecting the connection with an air pocket
• NS polyester outside/Nomex^® and HS polyester inside - thermal upgrade (155° C), plus cut-through protection
• HS polyester outside/extruded polyethylene tube inside - designed as a lower-cost alternative to a heavy-wall (.012") all HS tube
• HS polyester outside/extruded Zytel (nylon) inside - provides superior cut-through protection

The noteworthy features of our insulation tubes include ...

• low extractable levels - below 2% - making them ideal for hermetic applications (air conditioners, refrigerators, etc.)
• ability to resist cut-through at splice connections
• ability to resist wear from abrasion due to vibration on crossover and lead-wire insulation

For more information on the materials, applications, and benefits of our motor insulation products, review and download our PDF Bulletin #S-19. Then contact PPG.